You are missing the issue, I want to get "white on dark blue" for highlighted text as that is the most visually obvious thing to me. Virtually every other OS I've ever used lets me do this.
Here on 10.3.9 the text foreground colour is always black, you are just changing the background highlight colour, nothing more :-/
Hell, let's see what happens if I make highlihhted text black.... :lol:
-edit-
Oh wait, I do think I missed a sarcastic note there :lol: